CN220914970U - Vehicle-mounted charger - Google Patents

Abstract

The utility model belongs to the technical field of chargers, and the telescopic charging wire, the circuit assembly and the shell assembly are assembled and combined into the vehicle-mounted charger, so that the vehicle-mounted charger is not required to be matched with a data wire for use, the vehicle-mounted charger is directly inserted into a cigar lighter socket in an automobile, and the mobile equipment can be charged by pulling out the telescopic charging wire, so that the vehicle-mounted charger is very convenient to use; the telescopic charging wire is composed of a conductive assembly, a winding assembly and a wire, wherein the conductive assembly comprises a conductive shaft seat and a conductive carrier, current is conducted through pins of the circuit assembly firstly to conduct the conductive shaft seat, then the conductive carrier is conducted through the conductive shaft seat, the conductive carrier connected with the wire can rotate around the conductive shaft seat, current is stably input and output to the wire, and winding of the wire is realized under the assistance of the winding assembly, so that charging stability is guaranteed while winding is realized.

Description

Vehicle-mounted charger

Technical Field

The utility model belongs to the technical field of chargers, and particularly relates to a vehicle-mounted charger.

Background

The vehicle-mounted charger is a charger powered by an automobile battery (car 12V, truck 24V), a USB port is arranged on the vehicle-mounted charger sold in the market at present, the mobile equipment can be charged only by connecting a charging wire or a data wire, the charging wire or the data wire is longer, the vehicle-mounted charger needs to be smoothed when in use, and the vehicle-mounted charger needs to be bundled to be stored after the use is finished, so that the use process is complicated.

Therefore, how to integrate the vehicle-mounted charger and the data line is a technical problem that needs to be solved by the current technicians.

Disclosure of utility model

In order to solve the above-described problems, the present utility model provides an in-vehicle charger.

The technical scheme of the utility model is as follows:

The present utility model provides an on-vehicle charger, comprising:

The telescopic charging wire comprises a conductive assembly, a winding assembly and a wire rod, wherein the conductive assembly is fixedly connected with the winding assembly, the conductive assembly comprises a conductive shaft seat and a conductive carrier, the conductive carrier is rotatably arranged on the conductive shaft seat and is electrically connected with the conductive shaft seat, and one end of the wire rod is fixedly connected with the conductive carrier;

The circuit assembly comprises a plurality of pins and a circuit board, one end of each pin is fixed on the circuit board, and the circuit board is electrically connected with the conductive shaft seat;

The shell component wraps the telescopic charging wire and the circuit board, the other end of the wire rod penetrates out of the shell component, and the other end of the pin is arranged on the surface of the shell component.

Further, the conductive shaft seat comprises a shaft body, the shaft body comprises a power transmission shaft core, a first power transmission shaft sleeve, a second power transmission shaft sleeve, a first insulator, a second insulator and a third insulator, the first insulator and the third insulator are sleeved on the power transmission shaft core, the second power transmission shaft sleeve is sleeved on the first insulator and the third insulator, the second insulator and the second power transmission shaft sleeve are sleeved on the first power transmission shaft sleeve, the first insulator is spaced apart from the power transmission shaft core and the first power transmission shaft sleeve, the second insulator is spaced apart from the first power transmission shaft sleeve and the second power transmission shaft sleeve, the third insulator is spaced apart from the power transmission shaft core and the first power transmission shaft sleeve, and the third insulator is spaced apart from the first power transmission shaft sleeve and the second power transmission shaft sleeve.

Further, the conductive shaft seat further comprises a seat, the seat comprises a containing groove matched with the bottom shape of the shaft body and a plurality of conductive holes formed in the containing groove, one end of the shaft body is fixedly installed in the containing groove, one end of the shaft body is provided with a plurality of electric wires, one ends of the electric wires are respectively and fixedly connected with a conductive shaft core, a first conductive shaft sleeve and a second conductive shaft sleeve, and the other ends of the electric wires respectively penetrate out of the conductive holes.

Further, the third insulator comprises a first layer structure, a second layer structure and a third layer structure, a first installation position is arranged in the first layer structure, a second installation position is arranged between the first layer structure and the second layer structure, a third installation position is arranged between the second layer structure and the third layer structure, the power transmission shaft core penetrates through the first installation position, one end of the first power transmission shaft sleeve penetrates through the second installation position, the second power transmission shaft sleeve is clamped on the third installation position, and a part of the first power transmission shaft sleeve is exposed out of the third layer structure.

Further, the circuit board is provided with a conductive contact, and the electric wire penetrating out of the conductive hole is connected with the conductive contact.

Further, the shell assembly comprises an inner shell, the inner shell wraps and fixes the telescopic charging wire, a convex column is arranged on one side of the inner shell, fixing holes are formed in the side edges of the conductive contacts, and the fixing holes are sleeved in the convex column.

Further, the conductive carrier comprises a plurality of electrical lead-out pieces and an insulating carrier, the electrical lead-out pieces are arranged at intervals along the axial direction of the insulating carrier, and each electrical lead-out piece is in electrical contact with the corresponding power transmission shaft core, the first power transmission shaft sleeve and the second power transmission shaft sleeve.

Further, a plurality of symmetrical slots are formed in the insulating carrier, each electrical lead-out piece is arranged in one corresponding symmetrical slot, the symmetrical slots divide the electrical lead-out piece into an inner contact portion and an outer contact portion, the inner contact portion is located on the inner wall of the insulating carrier, the inner contact portion is in electrical contact with the power transmission shaft core, the first power transmission shaft sleeve and the second power transmission shaft sleeve, the outer contact portion is located on the outer wall of the insulating carrier, and the end portion of the wire rod is in electrical connection with the outer contact portion.

Further, a plurality of first connecting holes are respectively formed in the base and the inner shell, a plurality of first connecting pieces are arranged between the plurality of first connecting holes in the base and the first connecting holes in the inner shell, and the first connecting pieces penetrate through the plurality of first connecting holes in the base and the first connecting holes in the inner shell.

Further, the shell assembly further comprises a first outer shell and a second outer shell, the first outer shell wraps and fixes the inner shell, wires penetrate out of the first outer shell, the second outer shell wraps the circuit assembly, and the pins are exposed out of the second outer shell.

The utility model has the beneficial effects that:

The telescopic charging wire, the circuit component and the shell component are assembled and combined into the vehicle-mounted charger, so that the vehicle-mounted charger does not need to be matched with a data wire for use, the vehicle-mounted charger is directly inserted into a cigar lighter socket in an automobile, and the mobile equipment can be charged by pulling out the telescopic charging wire, so that the vehicle-mounted charger is very convenient to use; the telescopic charging wire is composed of a conductive assembly, a winding assembly and a wire, wherein the conductive assembly comprises a conductive shaft seat and a conductive carrier, current is conducted through pins of the circuit assembly firstly to conduct the conductive shaft seat, then the conductive carrier is conducted through the conductive shaft seat, the conductive carrier connected with the wire can rotate around the conductive shaft seat, current is stably input and output to the wire, and winding of the wire is realized under the assistance of the winding assembly, so that charging stability is guaranteed while winding is realized.

Drawings

FIG. 1 is a schematic exploded view of an in-vehicle charger according to the present utility model;

FIG. 2 is a schematic diagram showing an exploded structure of a conductive axle seat of an on-vehicle charger according to the present utility model;

FIG. 3 is a schematic view of a conductive component of an on-vehicle charger according to the present utility model;

FIG. 4 is a schematic view showing the structure of a third insulator of an in-vehicle charger according to the present utility model;

FIG. 5 is a schematic diagram showing a connection structure between a conductive shaft seat and an electrical wire of an on-vehicle charger according to the present utility model;

FIG. 6 is a schematic diagram of an assembled structure of an on-board charger according to the present utility model;

FIG. 7 is a schematic view showing the structure of the first inner housing, the base and the circuit board of the vehicle-mounted charger according to the present utility model;

FIG. 8 is a schematic view of the reverse side of FIG. 7;

FIG. 9 is a schematic diagram of a conductive component of an on-vehicle charger according to a second embodiment of the present utility model;

FIG. 10 is a schematic view of a conductive carrier of an in-vehicle charger according to the present utility model;

FIG. 11 is a schematic view showing an exploded structure of a conductive carrier of an in-vehicle charger according to the present utility model;

Fig. 12 is a schematic view showing an exploded structure of a telescopic charging wire and an inner housing of an in-vehicle charger according to the present utility model.

Reference numerals: 1. a telescopic charging wire, 2, a circuit component, 21, pins, 22, a circuit board, 221, conductive contacts, 222, fixing holes, 3, a housing component, 31, an inner housing, 311, a first inner housing, 3111, a wire slot, 312, a second inner housing, 3121, a post, 3122, a protrusion, 32, an outer housing, 321, a first outer housing, 322, a second outer housing, 4, a conductive component, 41, a conductive shaft seat, 411, a shaft body, 4111, a conductive shaft core, 4112, a first conductive shaft sleeve, 4113, a second conductive shaft sleeve, 4114, a first insulator, 4115, a second insulator, 4116, a third insulator, a first layer structure, b, a second layer structure, c, third layer structure, d, first installation position, e, second installation position, f, third installation position, 412, seat, 4121, conductive hole, 4122, holding groove, 42, conductive carrier, 421, electrical lead-out piece, 4211, inner contact, 4212, outer contact, 422, insulating carrier, 4221, symmetrical slotting, 4222, inner convex edge, 4223, notch, 5, wire coiling component, 51, first turntable, 52, second turntable, 53, clamping device, 54, elastic device, 6, wire, 61, clamping part, 7, electrical lead, 81, first connecting hole, 82, first connecting piece, 83, second connecting hole, 84, second connecting piece.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

It should be noted that when an element is referred to as being "mounted on," "disposed on," "covered on," "sleeved on" or "engaged with" another element, it can be directly on the other element or be indirectly on the other element.

It is to be understood that in the description of the utility model, the meaning of "a number" is two or more, unless explicitly defined otherwise.

In addition, the terms "inner", "upper", "between", "two sides", "one side", "top", "bottom", "side", etc. indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

It should be noted that the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", "a third", etc. may explicitly or implicitly include one or more such feature.

It should be noted that "and/or" herein is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. Wherein A and B may be singular or plural, respectively.

Referring to fig. 1 and 12, the present utility model provides an on-vehicle charger, comprising:

The telescopic charging wire 1, the telescopic charging wire 1 comprises a conductive assembly 4, a winding assembly 5 and a wire rod 6, the conductive assembly 4 is fixedly connected with the winding assembly 5, the conductive assembly 4 comprises a conductive shaft seat 41 and a conductive carrier 42, the conductive carrier 42 is rotatably arranged on the conductive shaft seat 41, the conductive carrier 42 is electrically connected with the conductive shaft seat 41, and one end of the wire rod 6 is fixedly connected with the conductive carrier 42;

The circuit assembly 2 comprises three pins 21 and a circuit board 22, wherein one end of each pin 21 is fixed on the circuit board 22, and the circuit board 22 is electrically connected with the conductive shaft seat 41; the three pins 21 may all be magnetic attraction pins 21; or only two of them are the magnetically attractable pins 21; one of the three can be a positive electrode pin 21, the other one is a negative electrode pin 21, and the last one has only a fixing effect;

The shell component 3, the shell component 3 wraps the telescopic charging wire 1 and the circuit board 22, the other end of the wire rod 6 penetrates out of the shell component 3, and the other end of the pin 21 is arranged on the surface of the shell component 3.

When the vehicle-mounted charger is inserted into a cigarette lighter socket of an automobile, the pin 21 plays a role in fixing and transmitting a power supply; the current is led through the pin 21 of the circuit assembly 2 by the conductive shaft seat 41, the conductive shaft seat 41 is conducted with the conductive carrier 42 again, the conductive carrier 42 connected with the wire 6 can rotate around the conductive shaft seat 41, the current is stably input and output to the wire 6, and the winding of the wire 6 is realized under the assistance of the winding assembly 5, so that the winding is realized, and meanwhile, the charging stability is ensured; the vehicle-mounted charger is more convenient to use without being externally connected with a data wire.

The structural principle of the conductive shaft seat 41 and the conductive carrier 42 of the conductive assembly 4 is specifically described:

The conductive shaft seat 41 comprises a shaft body 411, wherein the shaft body 411 comprises a power transmission shaft core 4111, a first power transmission shaft housing 4112, a second power transmission shaft housing 4113, a first insulator 4114, a second insulator 4115 and a third insulator 4116, the first insulator 4114 and the third insulator 4116 are sleeved on the power transmission shaft core 4111, the second power transmission shaft housing 4113 is sleeved on the first insulator 4114 and the third insulator 4116, the second insulator 4115 and the second power transmission shaft housing 4113 are sleeved on the first power transmission shaft housing 4112, the first insulator 4114 is spaced apart from the power transmission shaft core 4111 and the first power transmission shaft housing 4112, the second insulator 4115 is spaced apart from the first power transmission shaft housing 4112 and the second power transmission shaft housing 4113, the third insulator 4116 is spaced apart from the power transmission shaft core 4111 and the first shaft housing 4112, and the third insulator 4116 is spaced apart from the first power transmission shaft housing 4112 and the second power transmission shaft housing 4112. So design, convenient equipment can improve product production efficiency.

The conductive shaft seat 41 further comprises a seat 412, the seat 412 comprises a containing groove 4122 matched with the bottom shape of the shaft body 411 and three conductive holes 4121 formed in the containing groove 4122, one end of the shaft body 411 is fixedly installed in the containing groove 4122, one end of the shaft body 411 is provided with three electrical conductors 7, one ends of the three electrical conductors 7 are respectively and fixedly connected with a conductive shaft core 4111, a first conductive shaft sleeve 4112 and a second conductive shaft sleeve 4113, and the other ends of the three electrical conductors 7 respectively penetrate out of the conductive holes 4121.

Specifically, the first power transmission shaft core 4111 is in a fencing shape, the first power transmission shaft housing 4112 is in a cylindrical shape, the first insulator 4114 and the second insulator 4115 are in a circular ring structure, the third insulator 4116 comprises a first layer structure a, a second layer structure b and a third layer structure c, a first mounting position d is arranged in the first layer structure a, a second mounting position e is arranged between the first layer structure a and the second layer structure b, a third mounting position f is arranged between the second layer structure b and the third layer structure c, the power transmission shaft core 4111 penetrates through the first mounting position d, one end of the first power transmission shaft housing 4112 penetrates through the second mounting position e, the second power transmission shaft housing 4113 is clamped on the third mounting position f, and a part of the first power transmission shaft housing 4112 is exposed on the third layer structure c. The third insulator is designed so that the other ends of the power transmission shaft core 4111, the first power transmission shaft housing 4112 and the second power transmission shaft housing 4113 can be fixedly connected to the electrical conductor 7.

It should be noted that the first insulator 4114, the second insulator 4115, and the third insulator 4116 are injection molded by a mold.

The circuit board 22 is specifically described as to how to electrically connect the conductive shaft base 41:

The circuit board 22 is provided with three conductive contacts 221, and the electric wires 7 penetrating out of the conductive holes 4121 are connected with the conductive contacts 221; the current passes from the pins 21 to the circuit board 22 and then via the electrical conductors 7 to the conductive pad 41, which conductive pad 41 then conducts the current to the wires 6 connected to the conductive carrier 42.

The conductive carrier 42 includes three electrical lead-out pieces 421 and an insulating carrier 422, wherein a plurality of the electrical lead-out pieces 421 are arranged at intervals along an axial direction of the insulating carrier 422, and each electrical lead-out piece 421 is electrically contacted with the corresponding conductive shaft core 4111, the first conductive shaft housing 4112 and the second conductive shaft housing 4113.

The insulating carrier 422 is provided with a plurality of symmetrical slots 4221, each of the electrical lead-out members 421 is disposed in a corresponding one of the symmetrical slots 4221, the symmetrical slots 4221 divide the electrical lead-out members 421 into an inner contact portion 4211 and an outer contact portion 4212, the inner contact portion 4211 is located on the inner wall of the insulating carrier 422, the inner contact portion 4211 is in electrical contact with the electrical core 4111, the first electrical shaft housing 4112 and the second electrical shaft housing 4113, the outer contact portion 4212 is located on the outer wall of the insulating carrier 422, the end portion of the wire 6 is electrically connected with the outer contact portion 4212, and further, the insulating carrier 422 is provided with a plurality of inner flanges, which are disposed between the two electrical lead-out members 421, and the electrical lead-out members 421 are separated by the inner flanges to prevent poor contact caused by dislocation of the electrical lead-out members 421.

Specifically, the electric wire 7 includes a live wire, a ground wire and a signal wire, and the power transmission shaft core 4111, the first power transmission shaft sleeve 4112 and the second power transmission shaft sleeve 4113 are respectively connected with the live wire, the ground wire and the signal wire; three wires are respectively a live wire, a ground wire and a signal wire in the wire 6, and the three electrical lead-out pieces 421 are correspondingly the live wire, the ground wire and the signal wire, so that the three electrical lead-out pieces 421 are in contact with the corresponding conductive shaft core 4111, the first conductive shaft sleeve 4112 and the second conductive shaft sleeve 4113 for conduction, wherein the signal wire can be increased along with the design requirement for data transmission of quick charge, and therefore, the number of the conductive shaft sleeves and the conductive holes 4121 can be increased according to the requirement.

Further, referring to fig. 1 and 10, a clamping portion 61 is fixed to the wire 6, the conductive carrier 42 is provided with a notch 4223, and the clamping portion 61 is clamped into the notch 4223.

The simple principle of the coil assembly 5 and the connection relationship between the conductive assembly 4 and the coil assembly 5 are described as follows:

The winding assembly 5 comprises a first turntable 51, a second turntable 52, a clamping device 53 and an elastic device 54, wherein a plurality of second connecting holes 83 are respectively formed in the insulating carrier 422 and the winding assembly 5, a plurality of second connecting pieces 84 are arranged between the plurality of second connecting holes 83 in the insulating carrier 422 and the second connecting holes 83 in the winding assembly 5, the second connecting pieces 84 penetrate through the second connecting holes 83 in the insulating carrier 422 and the winding assembly 5, and the insulating carrier 422 and the winding assembly 5 are connected into a whole through the second connecting pieces 84, namely the second connecting pieces 84 penetrate through the first turntable 51, the second turntable 52 and the second connecting holes 83 in the insulating carrier 422;

When the insulating carrier 422 rotates around the conductive shaft seat 41, the first rotary table 51 and the second rotary table 52 also rotate along with the rotation, and the wire 6 automatically contracts through the elastic device 54; the clamping device 53 realizes different length states when the wire rod 6 is stretched.

It should be noted that the structural principle of the winding assembly 5 is described in the patent No. 2023208665436, and the description thereof is omitted herein.

The structural composition of the housing assembly 3 is as follows:

The housing assembly 3 includes an inner housing 31, the inner housing 31 wraps and fixes the telescopic charging wire 1, a protruding column 3121 is provided on one side of the inner housing 31, a fixing hole 222 is provided on a side of the conductive contact 221, and the fixing hole 222 is sleeved in the protruding column 3121. Since the first rotary plate 51, the second rotary plate 52 and the insulating carrier 422 are rotated in response to contraction of the wire 6, the inner case 31 is designed to fix the telescopic charging cord 1 therein for reducing vibration or noise.

The base 412 and the inner shell 31 are respectively provided with a plurality of first connecting holes 81, a plurality of first connecting pieces 82 are arranged between the plurality of first connecting holes 81 on the base 412 and the first connecting holes 81 on the inner shell 31, the first connecting pieces 82 penetrate through the plurality of first connecting holes 81 on the base 412 and the first connecting holes 81 on the inner shell 31, and the base 412 and the inner shell 31 are further fixedly connected through the design of the first connecting holes 81.

The inner shell 31 comprises a first inner shell 311 and a second inner shell 312, the first connecting hole 81 is arranged on the first inner shell 311, the second inner shell 312 is provided with a plurality of protrusions 3122, and the protrusions 3122 are used for fixing the clamping device 53; the surface of the first inner shell 311 is provided with a plurality of wire slots 3111, the electric wires 7 are clamped in the wire slots 3111, and three electric wires 7 are respectively clamped in the corresponding wire slots 3111, thereby preventing the electric wires 7 from breaking when the electric wires are crashed.

The housing assembly 3 further comprises a first outer shell 321 and a second outer shell 322, the first outer shell 321 wraps and fixes the inner shell 31, the wire 6 penetrates out of the first outer shell 321, the second outer shell 322 wraps the circuit assembly 2, and the pins 21 are exposed out of the second outer shell 322.

The above examples illustrate only one embodiment of the utility model, which is described in more detail and is not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An in-vehicle charger, comprising:

The flexible charging wire (1), flexible charging wire (1) includes conductive component (4), spiral subassembly (5) and wire rod (6), conductive component (4) with spiral subassembly (5) fixed connection, conductive component (4) include conductive axle bed (41) and conductive carrier (42), conductive carrier (42) rotatable install in on conductive axle bed (41), just conductive carrier (42) electric connection conductive axle bed (41), the one end fixed connection of wire rod (6) conductive carrier (42);

The circuit assembly (2), the circuit assembly (2) comprises a plurality of pins (21) and a circuit board (22), one end of each pin (21) is fixed on the circuit board (22), and the circuit board (22) is electrically connected with the conductive shaft seat (41);

The shell component (3), shell component (3) parcel flexible charging wire (1) with circuit board (22), the other tip of wire rod (6) is followed wear out in shell component (3), the surface of shell component (3) is located to the other end of pin (21).

2. The vehicle-mounted charger of claim 1, wherein the conductive shaft base (41) comprises a shaft body (411), the shaft body (411) comprises a conductive shaft core (4111), a first conductive shaft housing (4112), a second conductive shaft housing (4113), a first insulator (4114), a second insulator (4115) and a third insulator (4116), the first insulator (4114) and the third insulator (4116) are sleeved on the conductive shaft core (4111), the second conductive shaft housing (4113) is sleeved on the first insulator (4114) and the third insulator (4116), the second insulator (4115) and the second conductive shaft housing (4113) are sleeved on the first conductive shaft housing (4112), the first insulator (4114) is spaced apart from the conductive shaft core (4111) and the first conductive shaft housing (4112), the second insulator (4115) is spaced apart from the first conductive shaft housing (4112) and the third insulator (4116), and the second insulator (4113) is spaced apart from the first conductive shaft housing (4112) and the first conductive shaft housing (4113) is spaced apart from the first conductive shaft housing (4112).

3. The vehicle-mounted charger according to claim 2, wherein the conductive shaft seat (41) further comprises a seat (412), the seat (412) comprises a containing groove (4122) matched with the shape of the bottom 4 of the shaft body (411) and a plurality of conductive holes (4121) arranged in the containing groove (4122), one end of the shaft body (411) is fixedly arranged in the containing groove (4122), one end of the shaft body (411) is provided with a plurality of electrical conductors (7), one ends of the electrical conductors (7) are respectively and fixedly connected with a conductive shaft core (4111), a first conductive shaft sleeve (4112) and a second conductive shaft sleeve (4113), and the other ends of the electrical conductors (7) respectively penetrate through the conductive holes (4121).

4. The vehicle-mounted charger according to claim 3, wherein the third insulator (4116) comprises a first layer structure (a), a second layer structure (b) and a third layer structure (c), a first installation position (d) is arranged in the first layer structure (a), a second installation position (e) is arranged between the first layer structure (a) and the second layer structure (b), a third installation position (f) is arranged between the second layer structure (b) and the third layer structure (c), the power transmission shaft core (4111) is arranged in the first installation position (d) in a penetrating manner, one end of the first power transmission shaft sleeve (4112) is arranged in the second installation position (e) in a penetrating manner, the second power transmission shaft sleeve (4113) is arranged on the third installation position (f) in a clamping manner, and a part of the first power transmission shaft sleeve (4112) is exposed on the third layer structure (c).

5. The vehicle-mounted charger according to claim 4, characterized in that the circuit board (22) is provided with conductive contacts (221), and the electrical leads (7) passing through the conductive holes (4121) are connected to the conductive contacts (221).

6. The vehicle-mounted charger according to claim 5, wherein the housing assembly (3) comprises an inner housing (31), the inner housing (31) wraps and fixes the telescopic charging wire (1), a protruding column (3121) is arranged on one side of the inner housing (31), a fixing hole (222) is arranged on the side of the conductive contact (221), and the fixing hole (222) is sleeved in the protruding column (3121).

7. The vehicle-mounted charger according to claim 6, wherein the conductive carrier (42) comprises a plurality of electrical connectors (421) and an insulating carrier (422), the plurality of electrical connectors (421) are arranged at intervals along the axial direction of the insulating carrier (422), and each electrical connector (421) is in electrical contact with the corresponding conductive core (4111), first conductive sleeve (4112) and second conductive sleeve (4113).

8. The vehicle-mounted charger according to claim 7, wherein the insulating carrier (422) is provided with a plurality of symmetrical slots (4221), each electrical lead-out member (421) is disposed in a corresponding one of the symmetrical slots (4221), the symmetrical slots (4221) divide the electrical lead-out members (421) into an inner contact portion (4211) and an outer contact portion (4212), the inner contact portion (4211) is located on an inner wall of the insulating carrier (422), and the inner contact portion (4211) is in electrical contact with the conductive core (4111), the first conductive sleeve (4112) and the second conductive sleeve (4113), and the outer contact portion (4212) is located on an outer wall of the insulating carrier (422) and an end portion of the wire (6) is electrically connected with the outer contact portion (4212).

9. The vehicle-mounted charger according to claim 8, wherein a plurality of first connecting holes (81) are respectively formed in the base (412) and the inner shell (31), a plurality of first connecting pieces (82) are arranged between the plurality of first connecting holes (81) in the base (412) and the first connecting holes (81) in the inner shell (31), and the first connecting pieces (82) penetrate through the plurality of first connecting holes (81) in the base (412) and the first connecting holes (81) in the inner shell (31).

10. The vehicle-mounted charger according to claim 6, wherein the housing assembly (3) further comprises a first outer case (321) and a second outer case (322), the first outer case (321) is wrapped around and fixes the inner case (31), and the wire (6) is threaded out from the first outer case (321), the second outer case (322) is wrapped around the circuit assembly (2), and the pins (21) are exposed to the second outer case (322).